Daikin CTXU25G2V1B Service Manual page 151

Troubleshooting
Troubleshooting
Check No.02
Refer to P.162
Check No.17
Refer to P.169
148
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the stop
valve opened?
YES
Check gas leakage.
Oil oozing at relay pipe
connections?
NO
Oil oozing at
internal piping?
NO
Check No.17
Check electronic expansion
valve?
YES
Does refrigerant
heat exchange drift
occur?
NO
Replace with the specified
quantity of refrigerant
Is insufficient gas
fault repeated?
NO
NO
YES
YES
Compressor
vibrates too much?
NO
NO
YES
YES
Check No.02
Thermistor check
YES
Replace the outdoor unit PCB
Is insufficient gas
fault repeated?
NO
SiBE12-908
Open the stop valve.
Repair flared portion of
piping or replace square
union.
Check the power transistor
YES
harness for looseness.
Correct it as required.
Replace cracked pipe if
any.
Check the piping for
improper contact. Correct
as required.
Replace cracked pipe if
any.
Replace the electronic
expansion valve.
Replace the heat
exchanger.
NO
Replace the defective
thermistor. (room
temperature, outdoor air,
indoor or outdoor heat
exchanger thermistor)
YES
Replace the compressor.
Procedure complete.
Procedure complete.
(R9450)
Service Diagnosis